Whistle alarm



Sept. 7 1926.

F. W. WOOD WHISTLE ALARM m Filed 1y 17. 1923 A TTORNEYS` Patented Sept. 7', 1926.

Anlagen.

:Aparecen had. Jui .1?,

M5 Yinvention rflatestegaal @Lammf Sis?- ihistlmah-iqh; is esmc'allyiwell adapted new;

am' particular l important fobject ,of; tliehilruention is to, eserideaahstle mechanism..ultramar edi sasulastantiallr@aanmeten "iftfhedspeases @hemeroteca thanautsd seme Qiwlenaer-nass 112e tes eser-ahlen 'ject1 ijs to pigoyide; simplex, eco?. di reisde" Nearby f baseer-eee@ omeatmlles distant'point. f' p To realize the foregoing and' otlicljzgbjects,

preferirei emiavenfiaaewenrises ma meng. l1 re s n -Sazirtioa -Of there@ irli ..1`-1:1.0'\i f}erigxeli "of "thetnvntiqag rter VAgngfldlA embqdimentpfpesonsuslgilledinit' e art will' understand that' many" Variations may be made Within the principles of the invention', and I contemplate the. Lemployment of vany structures that are properly Within the scope ofthe appended claim.

Figure l is a frontelevation of mechanism embodying the inventionV in one form.

tion in a pla-ne perpendicular tov that of Figure 1. l

' Figure 3 is a horizontal section substantially in the plane of the cylinder axis, looking upward. `Y

The alarm whistle is` preferably, although not necessarily in all cases, arranged as a kself-contained unit on a suitablegframe orbase and particularly, asin the Vpresent example, `its elements are enclosed in or #whereas of the maia niet@ Figure 2 is a vertical longitudinal sec-` Assrerron To. claras. corti le son;

iii-merma rw ma f nafsmairfa 55am..

0111z1afl-as Parts heusinenwllieli Can- Sxsts Qi? weinen Sedi- Gal and Sarto'li .2 Seemeddetahably t0 the base ih dflisuallywith an ntermeet sunnort,

f tabl@ electric motely 7 is secured;

Que cylinders are prQy-ded, and While-th e-jlinght he separate parts they aredesrabh. termed as ntegralapart casmgseotrien, and; arejprefer al l ange sc ws or bore'arfd-thefelt discs extend beyond the edges of the metal discs and bear aga-insJ the bore to provide a tight, lubricant-retaining packing.

Piston rods 25 are secured to thecenters of the pistons and the inward ends of the rods are screwed and pinned or otherwise secured in lugs 26 formed on a Scotc'h yoke 27.y A p v Suitably supported within the casing, conveniently upon a bracket 30 integrally i @n the runter; armatuaie. 1Q- is a piaf ed byzspungsl-G secured tofthe cylo formed or secured therein, is a bearing sleeve 3l in which is mounted a gear shaft 32 having at one end a flange 33 and secured at the other end .against axial displacement by a nut 34 and Washer 35. A gear 40 whiohis usually of considerably larger diameterthan pinion 1 1, is Secured to shaft flange 33 by lli) screws or rivets 41, and the gear may be into the outer part of the cylinder either centered by a stud 42 on the en of the shaft throughvthe valve hole 14 or through the air and fitting in a hole in the center ot the gear.Y The gea-r'engages pinion 11, and is provided with a crank pine45 on which 1s rotatably mounted a bushing 46 located 1n the slot of yoke 27. A washer 47 is placedV between the bushing .and the gear and serves to locate the bushing at one end and also to provide a clearance between the gear i'ace and the face of the yoke, and a washer 4S ot ample diameter is also secured on the outer end of the crank pin, overlying the outer tace of the yoke, and secured by a nut 49. The described construction provides in an obvious way for the driving ot the. pistons to and fro whenever the motor is en ergized, the drive gearing being usually arranged with a reduction ratio as described,

' to provide reasonable piston speed with a fairly high-speed motor. The described construction .also provides for the proper maintenance of the yoke in proper position parallel to the gear wheel without any elabora-te devices for that purpose, this alignment being maintained by the ample bearing faces of washers 47 and 4S at opposite sides of the yokes in .all positions ot' the crank pin.

One or more whistles may be provided, and they may be arranged in any suitable position and properly connected with the cylinders, but conveniently, and preferably in most cases, as in the present embodiment of the invention, the whistles 50 are arranged as units on bases 51 which are connected directly with the outer parts of the cylinders. Speciiically, as here shown, the whistle bases are in the form of hollow nuts with threaded extensions 52, which are screwed into .suitably threaded hol-es 53 in outward portions of the cylinders near the outer ends thereof. The whistle units are of any known or suitable type, and each includes a stein 54 supporting the whistle tube 55 and air nozzles 56 are arranged to direct air jets against the open edge of the tube.

At every inward piston stroke air is drawn passage in the whistle base, or both, and on each outward stroke the valve 15 closes and air is compressed and driven forcibly out, producing a sharp whistle blast which is readily audible in the midst of the other noises, including the noise of battle, and these blasts are rapidly repeated, two blasts occuring with each rotation of gear 40 when two whistles are provided.

The whistle bases may be unscrewed and the whistles enclosed as units within the casing tor shipment, and may be easily reinounted in an obvious way when the apparatus isset up for use.

One or more of the complete appliances may be included in one circuit or a plurality of the appliances mav be play-ed in different circuits, and however, the circuits may be arranged, the alarm is sounded merely by closing the circuit at a suitable switch, which may, if desired, be arranged so that the mot-or runs to sound the alarm for any designated time and is then automatically cut ott; or any other desired control arrangement may be provided.

claim:

A unitary, self-contained signal or alarm comprising a. housing including base and cover portions, an electric motor secured to the base within the housing, opposite cyliir ders on a common axis formed as parts ot the base section oit the casing, heads secured on outward ends of the cylinders, check valves cooperating with valve holes in the heads, a piston in each cylinder, a gear rotatably mounted in the casing, a pinion on the motor shaft engaging the gear, means including a crank connecting the gear to the piston, and a whistle unit mounted on each cylinder and in communication with the interior thereof.

Signed at New York city, in the county of New York and State of New York this 21st day of June A. D. 1923.

FRANK W. WOOD. 

